I had no problems for about a year. A couple days ago I installed windows 10. Yesterday I shut down the PC then brought it up a few hours later. It gave me a choice of users HP administrator or my own account. I picked my account. The desktop was not the one for my account. I switch back-and-forth between users a couple times and finally got the right desktop for my account. Everything seemed fine. This morning I find that my PC has a blank screen and is unresponsive to the Mouse or keyboard. I swaped the monitor with a different one and it was still blank. I also tried another keyboard. What do you suggest I do at this point?